

if __name__ == '__main__':
    # 整数
    age = 25
    print("年龄是整数：", age)

    # 浮点数
    height = 1.75
    print("身高是浮点数：", height)

    # 字符串
    name = "John"
    print("姓名是字符串：", name)

    # 布尔值
    is_student = True
    print("是否是学生的布尔值：", is_student)

    # 空值
    result = None
    print("空值：", result)